<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<table width="100%" border="1">
    <tr>
        <td colspan="3">已登录信息如下</td>

    </tr>

    <tr>
        <td>张三</td>
        <td>男</td>
        <td>18岁</td>
    </tr>

    <tr>
        <td>李四</td>
        <td>女</td>
        <td>20岁</td>
    </tr>
</table>

</body>
</html>